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Finding the Fourth Proportional to 339.03, 507.87 and 318.33

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Solution

The fourth proportional to 339.03, 507.87 and 318.33 is: 476.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.03 : 507.87 = 318.33 : x
  2. Step 2: Convert to fraction form
    339.03/507.87 = 318.33/x
  3. Step 3: Cross multiply
    339.03x = 507.87 × 318.33
  4. Step 4: Simplify right side
    339.03x = 161,670.26
  5. Step 5: Solve for x
    x = 161,670.26/339.03
  6. Step 6: Final answer
    x = 476.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.